Automatic valve for gas-stoves.



J. H. BRADDON. AUTOMATIC VALVE FOR GAS ST0VES APPLICATION FILED NOV. I0, 1914.

- Patented May 2,1916.

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A zllllllllllll ATTO R N EY IHE COLUMBIA PLANOGRAPI! CO. WASNINGTQN, D. C.

which will supply the JA Min s n. annurnnoiv auToaiA'ric vnnvnvnon Manama i'eieso.

spear-mam of Letters Patent.

" n p-ncation fiied November 10, 191 4. se'riai Noi87li319.

of 'Qhio, "have invented a new useful Automatic Valve for Gas-Stoves, of which the following is a specification.

This invention has referenoe :to automatic valves for gas stoves, and its object is to provide a valve for'eontrolli'ngthe =gas supplied to-the burner or hurnersof a *gas' stove burner with 'gas only in the event th at I a booking utensil or the like is in position over the burner.

The invention comprises a valve structure between the main supply *pipe and eaeh burner-or group of burnersfprovided *witha Inain cut-ofi valve and another eut'ofi? valve having a normal tendency toward the olosed position 'amlandvahle *to the open position by the proper article placed over the burner.

The valve structure is also provided with a pilot i'lame device having means for its controland whollyput of control ofthe autounatic valve.

Provision is made for adjusting the valve structure 1 and especially that part "responsive to the cooking utensil to different positions to one sideor the other of the center line of the valve structure, so 'as' to accoinniodatethe valve structure to clifierent'typesotfburners; The invention also inoludes bther features whidh will be explained farther "on. p

The invention will"bebestinideistood from a consideration of the following detailed description, taken in *oonne'ction with the-aooompanying drawings forming apart ofthis specification, with the further rinderstirnding that while the drawings show apraetical form of the invention, the latter is not con fined to any strict conformity with the showof the drawings, but niay bebhanged and inodiffiedso long as such changes and modifications mark no material departure from the salient features of the invention.

lnthe drawings :Figure1 is an elevation of the improved hurnerstrrioture applied to a stove with the "main gassupply pipe and a part of theiranieofthe stove in crossseetion, only so "much oil the stove being shown as is necessary for an understanding of the invention. Fig. 2 is a plan view or the structure shown Fig. 1,showing the niain gas supply pipe in plan and omitting tiat portion of then-am ofthe i'stovetshown in Fig. 1. "Fig. 3 isa section on ithe hne of F g. 2 with some parts =sl1own P111 Fig. 2' omitted. Fig. 4 is a'section onz'the lin'el' of Fig. 2, somedistant parts b'eing omitted. Fig. 5is a section on theline o o of F g; 3. F g.6 1s=a seetion on theline G B-tifFig. 3. Fig.7 is'a iraginentary ele vatio'n -=showing I some of the parts disclosed in Fig. 1 and illustrating an adaptation of the invention. 7

Referr ng to the drawings there is shown fabuf'ner hand a small portion offthe cover frameQfof gas stove, and there is also shown a portion ofthe inaingas supply pipe of theis'tove. These parts, which are all that 1t1's necessary "to show for an understanding of the invention, may be taken as indicative or a gas stove "of any approved or ilnproved type.

The burner 1 is provided with a neck l andloetweenthis neolre and the pipe 3 the i alve structure of the present invention is installed. There is provided'a body member 5' havinga side nipple tl threaded to en ter-"the pipe 3,- a's in Figs. '1, 2 and 3, or to enter an elbow '7 applied to thefpipe 3, as

in Fig. 7, since in some forms of gas stoves it iscustomary to connect up the burners 1 wit'hflthe supply pipe 3 at a lower level than in other forms of {gas stove. The nipple 6 has a here or longitudinalfpassage 8 leading 'to a 'por't'9 formed in a valve plug 1 0 mounted in the body 5 for/oseillatory movement.

The1'3l-u g10 is made of the customary taper type, "and is held to its seat by a spring 11 appndabout an adjusting screw 12 at the 1 small end of the "plug. The other or large end of the p'lt l-g has L p l H an angle handle or lever 13 thereon. )This lever, which oonstltutes "the manipulating lever of the plug, may be "east in one piece therew plied, and has a manipulating end le offset fto oneside 'ofithe axis of the plug 10.

In "the installed position of the valve structure the axis of the plug 10 is usually horizontal and the manipulating end 14 of 'the ha-ndle 13 is about upright when the valve plug 10 has fitsport 9 in what may be termed the open position. In thefelosed position fdfthe valve phi-g 10 "themanipulating end lllextends atan angle "to both the vertical-and horizontal, the valve plug 10 having a movement of rotation about its axis "suliic'ient, to c'arry the port '9 into and out of caramel-nation with he passage 8, and the il atentedMa-y 2, 1916. Y

: oiotherwise appin on the body ofthe seat 21 therein extentof. this movement is controlled bya valve plug movmg 1n an elongated notch or recess 16 in the body 5 of the valvestructure.

accommodate the structure 'to different means of connection with the pipe 3 and moreparticularly to accommodate the strucpipe 3 through the ture for connection to the elbow 7 If the handle 13 were radial throughout its length and had noangle manipulating end 14, the amountof movement provided for the opening and closingof the valve with the handle 14 upright'in the open position, would cause the handle to strike the pipe?) before the valve plug had reached thefully closed position. By offsetting the handle as shown and described, the pipe 3 does not interfere with the proper manipulation of the valve plug; j r

'The valve body 5 is provided with a bonnet 17 having at oneend a threaded portion 18 adapted to screw into the body 5 and thereby form a chainberc19v therein. Within this chamber.{.,and constituting the bottom thereof in the installed position of the is a ledge 20'having a valve communicating by. a passage 22 with the bore or seat provided'for the valve plug 10; In the particular construction shown, where the nipple 6 is substanvalve structure,-

' tiallyhorizontal .in the installed position tal, while the of the device, the passage 8 is'also horizonpassage 22 is upright or vercal. Consequentlythe port orpassage 9 through .the valve plug 10 is anangle pasthe passage'8 it also theseat 21] head 24 tends.

in communication with communicates with the passage 22 despite the angular relation of sage, so that when these passages one to the other.

Carried by the bonnetl? is a valve stem 23 axial to the bonnet vand terminating at the lower end in a valve head 24 adapted to A, spring 25, encircling the stem 23 between the bonnetl? and the valve constantly to hold the valve head 24 in the closed. position:

7 That end 'of theibonnet remote from the interior of thevalve is axially counterbored andithreaded to receive a packinggland 26 in the counterbore the bonnet about the counterbore is threaded .cated at the upper I oribolt 33. vThe valve and also formed with a radialshoulder 28 r to ,Whichis applied a 1 29 held to the shoulder ring-shaped bracket plied to the threaded exterior of'the counterbored end of the bonnet. The bracket is formed with an upstanding. arm 31 bifura pair of opposed cars 32 carrying a pivot pin stem 23 is of sufficient length to extend for an appropriate distance beyond the gland 26 and i there receives a collar 34 held many desired position of ad- The purpose of offsetting thevalve plug handle 13 is to o from the angle of gas under 'finds its way of the valve plug 10, and passage 22 into the neck 4 through be described, and consequently when the 28 by a nut apvh end and there formed into or in any other appropriate manner.

The pivot pin 33 traverses a lever 36 and constitutes the pivot or fulcrum therefor. This lever 36 has a short arm 37 terminating in a yoke 38 with rounded terminal portions 39 straddling the valve stem 23 and underriding the collar 34. The lever has a long arm 40 with adrop portion 41 and terminates in a sleeve 42 having its bore perpendicular to the length of the lever and entered by a set screw 43 carried by the lever. The drop portion 41 is designed to locate the free end of the longer arm of the lever at a lower level than the shorter arm to provide for differences in elevation of parts of the gas stove. Entering the sleeve 42 is an angle end 44 of a rod 45 having the end remote end 44 bent at an angle to the main portion of the rod, as shown at 46, a.

the bent or angle ends 44 from the main site directions. knob or button VVhen'the the knob 47 and 46 extending portion of the rod in oppol;he'end 46 terminates in a 4 2 parts are in operative position is in overstanding relation to the burner l and isat a higher level than the top 2 of the stove. If, now, any article of sufiicient weight be placed upon the knob 47 it is depressed causing the lever 36 to turn upon its fulcrum 33, so that the ends 39 of the arm .337 lift the valve stem 23 through the collar 34, thereby compressing the spring'25 and lifting the valve head 24 out of the seat 21. If under these circumstances it be assumed that there is a. supply pressure in the pipe 3, such gas through the passage 8, port 9 is in constant passage 48 extending chamber'19. This chamber communication with a lengthwise through a neck 49 formed on the body 5 diametrically opposite from the nipple 6. The passage 48 opens into the burner certain regulating means to valve 21 is opened gas flows with such freedom as is provided for by the regulating means, to the burner 1, where it is ignited in a manner to be described, and the burning gas supplies heat in the usual way, but only so. long as the cooking utensil or other article to be heated is in engagement with the knob 47 to thereby cause the opening of the valve 21. As soon as the article being eated is removed from the stove, the spring 25 is free to act and at once causes the closing of the valve and the cutting off of the gas supply to the burner 1.

In order to initially regulate of gas flowing to the burner when the valve head 21 is in the open position, the passage or bore 48 is counterbored at its outer end, as shown at 50, and is also there internally threaded. Lodged in this counterbore is a the supply in. a needle valve, an expanded passages i and always maintain ng its posiposition the bottom of the counterbore.

maximum supply of gas "from the passage L8 0 w u l reception of a threaded into the counterbore 50. threaded outer end of the counterbore is a screw plug having the outer end closed'except for a central passage 56, and this plug is provided with an interior bore '57 freely open at the inner end and communicating with the passage 56. Theplug 55 bears against one end of a spring 58.1odged within the counterbore 50 and bearing against the head 53 so as to always maintain this head at the inner end of the counterbore with such force as the compression of the spring may exert. By screwing the plug 55 into or out of the counterbore to an appropriate extent the passage 56 is more or less throttled by the needle valve 52 so that the etiective. size of the outlet for the gas from the valvestrncture into the neck 4 of the burner may be predetermined by a suitable adjustment of theplug 55. Themessure exerted by the spring 58. is of no material moment since it is not intended that the relatively light gas pressure shall have any influence upon the needle valve, so that the needle valve for all operative purposes may be considered as stationary, but for constructive purposes it may be separately manufactured and placed in the counterbore in such manner as is shown and described, or in other appropriate manner.

The body 5. has an ollset 59 provided with a longitudinal here or passage 60 whichmay be of relatively small diameter as compared with the passage 8, or this bore 60 may be as large as needed. That end oi the bore 60 remote fromthe passage 8 is closed by a screw plug 61. The offset has another bore 62 transverse to and extending across the bore 60, and this bore 62 is threaded to receive a screw plug 63 which may be employed. to completely close the bore or passage 60 when such may be desirable. Between. the bore 8 and the outer end of the offset 59 and on the side of the bore 62 remote from the bore or passage 8 is another passage 64: which may be of quite small diameter and is counterbored to receive the nipple end 650i a valve casing 66. This nipple end is provided with a longitudinal small bore 67 opening into a larger counterbore 68 suitably interiorly threaded for the manipulating portion 69 of a valve stem 70, which latter ter minates in a needle valve 71 adapted to control the passage or bore 67. The valve casing 66 is provided with a threaded. side nipple 72 opening into the counterbore 68 for receiving one end'oif a pipe 73 of small Entering the diameter of alength sufficient to reach to l the burner 1; and may terminate closely adiacent .to the burner.

l l hen it is desired to. start the stove the valve 71 is open, and this valve controlling a passage always in communication. with the pipe 23 tlnrough the respective passages 6'7, 64:, 60 and 8, supplies. gas to the pipe 7 3 irrespective of a the position of the valve plug 10. The valve structure 66 together with the pipe 73 constitutes a pilot structure, so that a pilot flame may be provided by the pipe 73 during the time that the stove may he in use, or, in fact, such pilot flame may be in use as long as desired. since the amount of gas consumed by the pilot flame is negligible. It is customary when it is desired to use the stove to light the pilot flame before opening up the main controlling valve plug 10, or this valve plug 10 may remain open indefinitely, since the flow of gas to the burner 1 is controlled ordinarily entirely by the valve head "21. With the pilot flame going the burner 1 immediately lights up as soon as a cooking utensil or other implement is placed upon the knob 47 to depress it, so that fuel is consumed .only as needed. This greatly economizes the consumption of fuel and does away entirely with the need of turning off the gas every time that the burner not in use, or, following the more wasteful procedure, permitting the gas to burn at the burner without utilizing the heat pro- 7 duced thereby.

The bracket 29 may be turned about the upright longitudinal axis of the valve structure into different lateral positions, such as indicated by the dotted lines 36 in Fig. 2. and the extent of lateral adjust ment may be even greater than this. Sometimes the burner 1 is not in. line with the neck 14 but is located to one side of the longitudinal center line of the neck. However. the head or knob 4L7 should be located somewhere near the center of the biuruer. The adjustability of the bracket 29. which is brought about by loosening the nut 30, makes provision for the application of the valve stimcture to various types oi? without the necessity of any change over in the construction otthe valve anism.

hen. the stove is to be left for some considerable time out of? use the valve plug or cut-oil" valve 10 is closed and the pilot burner valve plug or cut-oft valve is closed. the automatic valve plug 24; requiring no manipulation to cut oft the gas. since it has a normal constraint to the cut o'lt position and moves thereto on the removal of the cooking utensil or other article that had been placed over the burner.

When the stove is in use the pilot burner wh a tin ech cutofl valve is opened and the pilot burner stoves lighted, but because of the minute quant ty ofgas so used, which quantity-is often 'placing the coo-king or the'stove over the burner in engagement with the times insufficient to make any perceptible show upon the gas meter, the pilot flame may be lighted, say, in the morning and kept lighted throughout the day, cut-ofi' valve 10 and the may be opened and allowed to remain open throughout the day, where upon after Oncelighting the pilot flame no further attention is needed, since the act of other utensil upon button 47 and from is sutlicient to light putit out respectively. 7 7

It is advantageous to. have the cut-oil valve 10 under the controlof a manipulatremoving it thereup the burner and 7 ing handle which stands upright when in stoves comprising a unitary valve casing,

with an lnlet nipple on let neck on the other .35

the handle may the open position, since then any disturbance of this handle will cause the shutting off of the gas and disturbances to which be subjected arepfar more liable to'move it downwardly than upwardly. Accidental opening of the valve plug 10 under circumstances which might possibly permit the escapeof gas at the burner at times when the pilot burner is not lighted, but is liable to happen.

rlVhatis claimed is 2- 1. An automatic valves'tructure for gas entirely out off, is not one side and an out side, and both located at a low point of thecasing in the installed position of the valve, a manually operable cut-off valve in the casing etween the nipple and neck and locatcdat a low point in the casing to turn upon a substantially horian automatically closing valve,

zonta] axis, in the casingbetween'the first-named valve anclthe outlet neck and movable up and down in a direction substantially perpendicular to the axis of movement of the firstname'd'valve, said second-named valve be ing provided with opening means connected thereto above the casing and of a length to. override a gas burner of the stove to which the valve structure is to be applied, and a pilot burner and valve therefor having a gas connection to the inlet gas nipple on the nipple side of the first-named valve.

2. An automatic valve st ucture for gas 'stoves having an automaticvalve for controlling the Copies of this patent may be obtained for five cents each, by addressing the ,which the valve be actuated by tudinal axis of the passage of gas therethrough, a

lever for actuating the automatic valve and of a length to be engaged by an article placed over the burner of the gas stove to structure is applied, and a supporting bracket for the lever mounted on the valve structure and movable about an axis coincident with the line of movement of the automatic valve.

3. An automatic valve structure for gas stoves, comprising a body member, a bonnet thereon, a valve carried by the bonnet and having a normal constraint toward the closed position, said valve controlling the passage of gas through the valve structure and provided with a stem mounted in and movable axially through the bonnet, an ad- 7 justable collar mounted on the stem, a supnormal constraint toward the closed position, operating means for the valve for moving it to the open position and adapted to an article placed over the burner of the stove when the valve is in the installed position, and a support for the operating means carried by the valve structure and movable with relation to the automatic valve to locate the operating means in different angular relations to the valve structure, whereby the valve structure is adaptable to stove burners of different types.

5. An automatic valve structure for gas stoves comprising a body member, a bonnet thereon, a valve mounted in the bonnet for movement therethrough and having :1 normal constraint toward the closed position, a lever for moving the valve toward the open position, and a supporting bracket for the lever mounted on the bonnet and movable to different positions about the longiautomatic valve.

In testimony, that I claim the foregoing as my own, I have hereto aliixed my signature in the presenceof two witnesses.

JAMES, H. BRADDON. lVitnesses W. H. Han,

W B. TnoMrsoN.

Commissioner of Patents.

Washington, D. G. 

